Dear Gary,

Thank you for the additional images and your patience.

The presented object appears to be a Superman DC Comics original illustration storyboard made in ink on Bristol board with the measurements of 16.25" x 10.25". This is issue #25 from the year 1988. The story was written by Roger Stern and the drafts drawn by Kerry Gammill and John Beatty. This scene shows the fight of Superman again Lex Luthor and Brainiac.
Works by this artist were recently offered and sold especially on the US auction market.
This piece is in good condition and there is no serious damage visible in the images provided.
A fair market estimation would be between 800 to 1.500 USD.
This estimate is based on actual recent past recorded auction sales of comparable items. Retail "asking prices" can be higher and may vary.

With kind regards,
Georg